Update .github/ISSUE_TEMPLATE/add-maintainer-checklist.md

Co-authored-by: Adrian Price-Whelan <[email protected]>

Author: eteq

.github/ISSUE_TEMPLATE/add-maintainer-checklist.md

@@ -10,7 +10,7 @@ assignees: ''
 If you are adding or removing someone from a team please check that the list of items on the [Adding New Role Members page](https://github.com/astropy/astropy-project/blob/main/policies/adding-new-role-members.md) has been completed. In particular,
 
 - [ ] PR to the Team page
-- [ ] email to the community
 - [ ] privileges and/or permissions updated 
-- [ ] added to astropy-core-maintainers mailing list
+- [ ] (if adding a new member) email to the community
+- [ ] (if adding a new member) add to astropy-core-maintainers mailing list